#include <stdio.h>
main()
{//lekai
    int nl,nm,i,j,flag,count=0;
    do{
        printf("Input START and END=?");
        scanf("%d%d",&nl,&nm);
    }
    while(!(nl>0&&nl<nm));
    printf
    ("------------------PRIME TABLE(%d-%d)------------------\n",nl,nm);
    if(nl==1||nl==2){
        printf("%4d",2);
        nl=3;count++;
    }
    for(i=nl;i<=nm;i++){
        if(!(i%2))continue;
        for (flag=1,j=3;flag&&j<i/2;j+=2)
        if(!(i%j))flag=0;
        if (flag)printf (++count%15?"%4d":"%4d\n",i);
    }
}